Customize: Clean up docs and code style for customize changes in 4.7.

* Adds missing `resolve`/`fail` for promise returned by `loadThemePreview`.
* Adds missing jsdoc blocks and tags.
* Adds missing phpdoc and makes corrections.

See #37770.
Fixes #38908.

Built from https://develop.svn.wordpress.org/trunk@39345


git-svn-id: http://core.svn.wordpress.org/trunk@39285 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/customize/class-wp-customize-custom-css-setting.php

@@ -21,10 +21,9 @@ final class WP_Customize_Custom_CSS_Setting extends WP_Customize_Setting {
 	/**
 	 * The setting type.
 	 *
-	 * @var string
-	 *
 	 * @since 4.7.0
 	 * @access public
+	 * @var string
 	 */
 	public $type = 'custom_css';
 
@@ -33,7 +32,6 @@ final class WP_Customize_Custom_CSS_Setting extends WP_Customize_Setting {
 	 *
 	 * @since 4.7.0
 	 * @access public
-	 *
 	 * @var string
 	 */
 	public $transport = 'postMessage';
@@ -43,7 +41,6 @@ final class WP_Customize_Custom_CSS_Setting extends WP_Customize_Setting {
 	 *
 	 * @since 4.7.0
 	 * @access public
-	 *
 	 * @var string
 	 */
 	public $capability = 'edit_css';
@@ -53,7 +50,6 @@ final class WP_Customize_Custom_CSS_Setting extends WP_Customize_Setting {
 	 *
 	 * @since 4.7.0
 	 * @access public
-	 *
 	 * @var string
 	 */
 	public $stylesheet = '';